No return for flavor destroy
No return for flavor destroy

_flavor_destroy doesn't need to return

TrivialFix

Change-Id: I77e12a6b511e84fa0223801f2bf93a762ad8c4fc

klmitch/nova,klmitch/nova,vmturbo/nova,vmturbo/nova,hanlind/nova,jianghuaw/nova,phenoxim/nova,mahak/nova,rahulunair/nova,Juniper/nova,openstack/nova,phenoxim/nova,rahulunair/nova,mahak/nova,gooddata/openstack-nova,jianghuaw/nova,gooddata/openstack-nova,Juniper/nova,klmitch/nova,Juniper/nova,openstack/nova,rajalokan/nova,vmturbo/nova,Juniper/nova,gooddata/openstack-nova,openstack/nova,vmturbo/nova,rajalokan/nova,mikalstill/nova,rajalokan/nova,rajalokan/nova,jianghuaw/nova,hanlind/nova,mahak/nova,mikalstill/nova,gooddata/openstack-nova,jianghuaw/nova,klmitch/nova,mikalstill/nova,rahulunair/nova,hanlind/nova